grub-probe: error: cannot stat `/dev/root'

From:

CACook

Subject:

grub-probe: error: cannot stat `/dev/root'

Date:

Fri, 6 May 2011 11:24:17 -0700

User-agent:

KMail/1.13.5 (Linux/2.6.37; KDE/4.4.5; x86_64; ; )

This just started after my most recent (very painful) dist-upgrade. It seems
that BTRFS is not compatible with grub and Debian. I very nearly lost my whole
system because of this catastrophe.
Does anyone know the nature of the error and how to fix?